JPS6292278A - Compact disc player - Google Patents

Compact disc player

Info

Publication number
JPS6292278A
JPS6292278A JP60233723A JP23372385A JPS6292278A JP S6292278 A JPS6292278 A JP S6292278A JP 60233723 A JP60233723 A JP 60233723A JP 23372385 A JP23372385 A JP 23372385A JP S6292278 A JPS6292278 A JP S6292278A
Authority
JP
Japan
Prior art keywords
compact disc
spindle motor
revolution
rotation speed
servo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP60233723A
Other languages
Japanese (ja)
Inventor
Shigeru Hagiwara
茂 萩原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP60233723A priority Critical patent/JPS6292278A/en
Publication of JPS6292278A publication Critical patent/JPS6292278A/en
Pending legal-status Critical Current

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  • Rotational Drive Of Disk (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE:To reduce a time until the start of a reproduction by providing a means that recognizes the number of revolution at an objected point and the means that accelerates and reduces compulsorily the speed of a spindle motor in the moving time of an optical pickup. CONSTITUTION:First of all, when the optical pickup is started to move to some point, a control part 16 recognizes the number of revolution to be revolved at the objected point from a number of revolution storage part 15 and compares it with the number of revolution of a compact disc in reproduction at present given from a number of revolution detection part 14, issuing a command to a spindle motor driving part 11 to accelerate or reduce compulsorily the speed of the motor. And it recognizes the present number of revolution of the compact disc from the number of revolution detection part 14 and compares it with the number of revolution to be revolved and when they are equal, it terminates the command of a compulsory acceleration or reduction to the spindle motor driving part 11, switching an operation to a servo that is the servo of regulated linear velocity by a servo (CLV servo) part 12. Thus, the time until a reproduction recording can be reduced.

Description

【発明の詳細な説明】 産業上の利用分野 本発明はコンパクトディスクの再生開始時に早く線速度
一定のサーボ(以下CLVサーボという)がかかるコン
パクトディスクプレーヤに関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a compact disc player that applies a constant linear velocity servo (hereinafter referred to as CLV servo) early when starting playback of a compact disc.

従来の技術 近年、コンパクトディスクプレーヤはその操作性や高音
質性が注目されている。
BACKGROUND OF THE INVENTION In recent years, compact disc players have attracted attention for their operability and high sound quality.

以下図面を参照しながら、上述した従来のコンパクトデ
ィスクプレーヤの一例について説明する。
An example of the above-mentioned conventional compact disc player will be described below with reference to the drawings.

第2図は従来のコンパクトディスクプレーヤのスピンド
ルモーター制御部分の構成図を示すものである。第2図
において、21はスピンドルモーター、駆動部である。
FIG. 2 shows a block diagram of a spindle motor control section of a conventional compact disc player. In FIG. 2, 21 is a spindle motor, a driving section.

22はスピンドルモーター駆動部21ヘサーボをかける
CLVサーボ部である。
22 is a CLV servo section that applies servo to the spindle motor drive section 21.

以上のように構成されたコンパクトディスクプレーヤに
ついて、以下そのスピンドルモーターの回転制御の動作
について説明する。
Regarding the compact disc player configured as described above, the operation of controlling the rotation of the spindle motor will be explained below.

再生開始時はスピンドルモーターは一定回転数となるよ
うスピンドルモーター駆動部21よυ駆動されて、その
のちディスクのデータの読み取りによりCLVサーボ部
2部上2記録線速度に従って回転数が制御される。
At the start of reproduction, the spindle motor is driven by the spindle motor drive unit 21 to maintain a constant rotational speed, and then the rotational speed is controlled according to the recording linear velocity of the CLV servo unit 2 by reading data from the disk.

発明が解決しようとする問題点 しかしながら上記のような構成では、コンノ(クトディ
スク上で指示された点へ光ピツクアップが移動した際、
線速度一定記録であるため光ピツクアップが移動してか
らCLVサーボをかけなおさなければならないため、再
生開始までに時間がかかるという問題点を有していた、 本発明は上記問題点に鑑み、指示された点へ光ピツクア
ップが移動する時は光ピツクアップが移動中にスピンド
ルモーターの回転数を目的地点にあった回転数にして早
<at、Vサーボがかけられるよう−にしたコンパクト
ディスクプレーヤを提供するものである。
Problems to be Solved by the Invention However, in the above configuration, when the optical pickup moves to a specified point on the computer disk,
Because linear velocity recording is constant, the CLV servo must be reapplied after the optical pickup moves, resulting in the problem that it takes time to start playback. To provide a compact disc player in which, when the optical pickup moves to a destination point, the rotational speed of the spindle motor is set to the rotational speed corresponding to the destination point while the optical pickup is moving, and a fast <at, V servo is applied. It is something to do.

問題点を解決するための手段 上記問題点を解決するために本発明のコンパクトディス
クプレーヤは、コンパクトディスクを再生スる際にスピ
ンドルモーターを駆動するスピンドルモーター駆動部と
、通常再生時にスピンドルモーター駆動部にサーボをか
けるCLVサーボ部、再生するコンパクトディスクの記
録線速度を検出する線速度検出部、再生中のコンパクト
ディスクの回転数を検出する回転数検出部、コンパクト
ディスク上の再生しようとする位置とコンパクトディス
クの回転数の関係を記憶線速度別に記憶している回転数
記憶部、線速度検出部と回転数検出部と回転数記憶部か
らの情報によシスピンドルモーター駆動部へ強制加速9
強制減速の指令を出す制御部、という構成を備えたもの
である。
Means for Solving the Problems In order to solve the above problems, the compact disc player of the present invention includes a spindle motor drive unit that drives the spindle motor when playing a compact disc, and a spindle motor drive unit that drives the spindle motor during normal playback. A CLV servo unit that applies servo to the disc, a linear velocity detection unit that detects the recording linear velocity of the compact disc being played, a rotational speed detection unit that detects the number of revolutions of the compact disc being played, and a position on the compact disc to be played. Forced acceleration to the system spindle motor drive unit 9 based on information from the rotation speed storage unit, the linear velocity detection unit, the rotation speed detection unit, and the rotation speed storage unit, which stores the relationship between the rotation speeds of the compact disk for each linear velocity.
It is equipped with a control section that issues a command for forced deceleration.

作用 本発明は上記した構成によって、光ピツクアップが移動
している時に、スピンドルモーターの回転を目的点の回
転数を予測して強制加速9強制減速させることによって
、再生開始までの時間を短かくすることができることと
なる。
Effect of the Invention With the above-described configuration, the present invention shortens the time until playback starts by forcibly accelerating (9) forcibly decelerating the rotation of the spindle motor by predicting the rotation speed of the target point while the optical pickup is moving. This means that you can do it.

実施例 以下本発明の一実施例のコンパクトディスクプレーヤに
ついて、図面を参照しながら説明する。
Embodiment Hereinafter, a compact disc player according to an embodiment of the present invention will be described with reference to the drawings.

第1図は本発明の実施例におけるコンパクトディスクプ
レーヤのスピンドルモーター制御部分の構成図を示すも
のである。第1図において、11はコンパクトディスク
を再生する際にスピンドルモーターを駆動するスピンド
ルモーター駆動部、12は通常再生時にスピンドルモー
ター駆動部11にサーボをかけるCLVサーボ部、13
は再生するコンパクトディスクの記録線速度を検出する
線速度検出部、14は再生中のコンパクトディスクの回
転数を検出する回転数検出部、15はコンパクトディス
ク上の再生しようとする位置とコンパクトディスクの回
転数の関係を例えば表1に示すように記憶している回転
数記憶部、16は線速度検出部13と回転数検出部14
と回転数記憶部16からの情報によりスピンドルモータ
ー駆動部11へ強制加速9強制減速の指令を出す制御部
である。
FIG. 1 shows a block diagram of a spindle motor control portion of a compact disc player according to an embodiment of the present invention. In FIG. 1, 11 is a spindle motor drive unit that drives the spindle motor when playing back a compact disc, 12 is a CLV servo unit that applies servo to the spindle motor drive unit 11 during normal playback, and 13 is a spindle motor drive unit that drives the spindle motor when playing a compact disc.
14 is a rotational speed detection unit that detects the recording linear velocity of the compact disc being played. 15 is a rotational speed detection unit that detects the rotational speed of the compact disc during playback. A rotation speed storage section stores the relationship between rotation speeds as shown in Table 1, for example; 16 is a linear velocity detection section 13 and a rotation speed detection section 14;
This is a control unit that issues commands for forced acceleration and forced deceleration to the spindle motor drive unit 11 based on information from the rotation speed storage unit 16.

表1 以上のように構成された本実施例のコンパクトディスク
プレーヤについて、以下その動作を説明するO まず光ピツクアップがある点への移動を始める時、制御
部16は回転数記憶部16より目的点でのあるべき回転
数を知り、回転数検出部14によシ知った現在再生中の
コンパクトディスクの回転数と比較してスピンドルモー
ター駆動部11へ強制加速または強制減速の指令を出す
。そして回転数検出部14より現在のコンパクトディス
クの回転数を知り、目的点でのあるべき回転数と比較し
て、同じになったらスピンドルモーター駆動部11への
強制加速または強制減速の指令をとめ、CLVサーボ部
12によるサーボに切り換える。
Table 1 The operation of the compact disc player of this embodiment configured as described above will be explained below. First, when the optical pickup starts moving to a certain point, the control section 16 uses the rotation speed storage section 16 to select the destination point. The controller 11 learns the number of revolutions that should be at the time, compares it with the number of revolutions of the compact disc currently being played, which is known by the number of revolutions detecting section 14, and issues a command for forced acceleration or deceleration to the spindle motor drive section 11. Then, the current rotation speed of the compact disk is determined from the rotation speed detection unit 14, and compared with the desired rotation speed at the destination point.When the rotation speed is the same, the command for forced acceleration or forced deceleration to the spindle motor drive unit 11 is stopped. , the servo is switched to the servo by the CLV servo section 12.

以上のように本実施例によれば、光ピツクアップが移動
する時に目的点の回転数を知る手段とスピンドルモータ
ーを強制的に加速、減速する手段をもつことにより、再
生開始までの時間を短縮することができる。
As described above, according to this embodiment, the time required to start playback is shortened by having means for knowing the rotation speed of the destination point when the optical pickup moves and means for forcibly accelerating and decelerating the spindle motor. be able to.

発明の効果 以上のように本発明はコンパクトディスクを再生する際
にスピンドルモーターを駆動するスピンドルモーター駆
動部と、通常再生時にスピンドルサーボ駆動部にサーボ
をかけるCLVサーボ部、再生中のコンパクトディスク
の回転数を検出する回転数検出部、コンパクトディスク
上の再生しようとする位置とコンパクトディスクの回転
数の関係を記憶している回転数記憶部、線速度検出部と
回転数検出部と回転数記憶部からの情報によりスピンド
ルモーター駆動部へ強制加速9強制減速の指令を出す制
御部を設けることにより、再生開始までの時間を短縮す
ることができる。
Effects of the Invention As described above, the present invention provides a spindle motor drive unit that drives the spindle motor when playing a compact disc, a CLV servo unit that applies servo to the spindle servo drive unit during normal playback, and a rotation of the compact disc during playback. a rotation speed detection section that detects the number of rotations, a rotation speed storage section that stores the relationship between the position on the compact disc to be played and the rotation speed of the compact disc, a linear velocity detection section, a rotation speed detection section, and a rotation speed storage section. By providing a control unit that issues commands for forced acceleration 9 and forced deceleration to the spindle motor drive unit based on information from the regeneration unit, the time required to start regeneration can be shortened.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例におけるコンパクトディスク
プレーヤのスピンドルモーター制御部分の構成図、第2
図は従来のコンパクトディスクプレーヤのスピンドルモ
ーター制御部分の構成図である。 11・・・・・・スピンドルモーター駆動部、12・・
曲at、Vサーボ部、13・・・・・・線速度検出部、
14・・・・・・回転数検出部、15・・・・・回転数
記憶部、16・・・・制御部。
FIG. 1 is a configuration diagram of a spindle motor control part of a compact disc player in an embodiment of the present invention, and FIG.
The figure is a configuration diagram of a spindle motor control portion of a conventional compact disc player. 11... Spindle motor drive section, 12...
Curve at, V servo section, 13... linear velocity detection section,
14... Rotation speed detection section, 15... Rotation speed storage section, 16... Control section.

Claims (1)

【特許請求の範囲】[Claims] コンパクトディスクを再生する際にスピンドルモーター
を駆動するスピンドルモーター駆動部と、通常再生時に
スピンドルモーター駆動部に線速度一定のサーボをかけ
るCLVサーボ部、再生中のコンパクトディスクの回転
数を検出する回転数検出部、コンパクトディスク上の再
生しようとする位置とコンパクトディスクの回転数の関
係を記憶している回転数記憶部と、回転数検出部と回転
数記憶部からの情報によりスピンドルモーター駆動部へ
強制加速あるいは強制減速の指令を出す制御部とを備え
たことを特徴とするコンパクトディスクプレーヤ。
A spindle motor drive unit that drives the spindle motor when playing a compact disc, a CLV servo unit that applies servo to the spindle motor drive unit at a constant linear velocity during normal playback, and a rotation speed that detects the rotation speed of the compact disc during playback. The detection unit, the rotation speed storage unit that stores the relationship between the position on the compact disc to be played and the rotation speed of the compact disc, and the information from the rotation speed detection unit and the rotation speed storage unit to force the spindle motor drive unit. A compact disc player characterized by comprising a control unit that issues an instruction for acceleration or forced deceleration.
JP60233723A 1985-10-18 1985-10-18 Compact disc player Pending JPS6292278A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60233723A JPS6292278A (en) 1985-10-18 1985-10-18 Compact disc player

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60233723A JPS6292278A (en) 1985-10-18 1985-10-18 Compact disc player

Publications (1)

Publication Number Publication Date
JPS6292278A true JPS6292278A (en) 1987-04-27

Family

ID=16959554

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60233723A Pending JPS6292278A (en) 1985-10-18 1985-10-18 Compact disc player

Country Status (1)

Country Link
JP (1) JPS6292278A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6396772A (en) * 1986-10-09 1988-04-27 Sony Corp Information signal reproducing device
JPS6476556A (en) * 1987-09-18 1989-03-22 Alpine Electronics Inc Optical pickup system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6396772A (en) * 1986-10-09 1988-04-27 Sony Corp Information signal reproducing device
JPS6476556A (en) * 1987-09-18 1989-03-22 Alpine Electronics Inc Optical pickup system

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